US4938191A - Induction device for multi-cylinder internal combustion engine - Google Patents

Induction device for multi-cylinder internal combustion engine Download PDF

Info

Publication number
US4938191A
US4938191A US07/282,494 US28249488A US4938191A US 4938191 A US4938191 A US 4938191A US 28249488 A US28249488 A US 28249488A US 4938191 A US4938191 A US 4938191A
Authority
US
United States
Prior art keywords
induction
axis
valves
manifold
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/282,494
Other languages
English (en)
Inventor
Emilio Oldani
Riccardo Rosa
Sergio Truzzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fiat Auto SpA
Original Assignee
Alfa Lancia Industriale SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alfa Lancia Industriale SpA filed Critical Alfa Lancia Industriale SpA
Assigned to ALFA LANCIA INDUSTRIALE S.P.A. reassignment ALFA LANCIA INDUSTRIALE S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OLDANI, EMILIO, ROSA, RICCARDO, TRUZZI, SERGIO
Application granted granted Critical
Publication of US4938191A publication Critical patent/US4938191A/en
Assigned to ALFA LANCIA S.P.A., ARESE (MILAN), VIALE ALFA ROMEO reassignment ALFA LANCIA S.P.A., ARESE (MILAN), VIALE ALFA ROMEO MERGER (SEE DOCUMENT FOR DETAILS). 1/01/90 Assignors: ALFA LANCIA INDUSTRIALE S.P.A.
Assigned to FIAT AUTO S.P.A. reassignment FIAT AUTO S.P.A. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 09/01/1991 ITALY Assignors: ALFA LANCIA S.P.A. (MERGED INTO)
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/109—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps having two or more flaps
    • F02D9/1095—Rotating on a common axis, e.g. having a common shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10183—Engines having intake ducts fed from a separate carburettor or injector, the idling system being considered as a separate carburettor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/108—Intake manifolds with primary and secondary intake passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/108—Intake manifolds with primary and secondary intake passages
    • F02M35/1085—Intake manifolds with primary and secondary intake passages the combustion chamber having multiple intake valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the present invention relates to an induction device for a multi-cylinder internal combustion engine, which is equipped with a plurality of induction valves, and with at least one exhaust valve per each cylinder, in particular with two induction valves per each cylinder, and which is equipped with drive means for said valves, wherein said induction device comprises individual induction manifolds, one manifold per each cylinder, and with at least two induction ducts branching off from each individual manifold, and leading to the corresponding cylinder through the above said induction valves, and wherein the two induction valves belonging to each cylinder are driven with lift laws respectively optimized for low revolution speed running and for high revolution speed running of the engine.
  • the engines equipped with a plurality of induction valves per each cylinder, and, possibly, with more than one exhaust valves, have, as compared to the engines with only two valves per cylinder, a larger actual surface area of passage through the valves; this fact favours the exchange of the gases inside the combustion chamber, because a larger amount of air, and consequently, of gasoline, can be introduced, and a larger amount of flue gases can be exhausted, during a time unit.
  • This patent also provides for a respective choke valve to be installed inside each induction duct, with one of said choke valves being operated by the accelerator pedal, and the other being operated by a suitable actuator, in such a way that it may remain closed under low revolution speed conditions.
  • the main purpose of the present invention is a simpler and cheaper solution, featuring an as satisfactory performance.
  • the present invention aims at achieving a high torque, together with reduced fuel consumptions and minimum emissions of polluting substances, when the engine operates at low speeds, and at increasing the peak power at high revolution speeds.
  • a respective choke valve has been installed inside each induction manifold, according to a solution per-se known, in particular for engines equipped with two valves per cylinder, and furthermore at least one fuel injector has been installed inside each individual induction manifold, downstream the respective choke valve, in an off-centre position relatively to the longitudinal axis of the same manifold, and shifted towards the side of the induction duct equipped with the induction valve having the lift law optimized for the low revolution speed operating conditions.
  • FIGS. 1-3 Characteristics and advantages of the invention are now illustrated by referring to the hereto attached FIGS. 1-3, wherein for exemplifying, non-limitative purposes, a preferred form of practical embodiment of the same invention is depicted.
  • FIG. 1 shows a sectional view of an induction device according to the present invention
  • FIG. 2 shows a partially sectional view along the path plane II--II of FIG. 1;
  • FIG. 3 shows charts of the lift laws of the valves of the engine of the invention.
  • FIGS. 1 and 2 a diagram is shown of an internal combustion engine equipped with four valves per cylinder; by the reference numeral 10, two cylinders are indicated, by the reference numerals 11 and 12 the respective induction valves, by 13 and 14 the respective exhaust valves, by 15 the spark plugs are indicated.
  • a relevant choke valve, for choking the feed indicated by the reference numeral 22, is installed; the choke valves 22 are connected with each other by a diagrammatically represented shaft 23, and are operatively linked with the accelerator pedal, not shown in the figures, as usual in the art.
  • an electroinjector is installed inside each manifold 16, downstream the relevant choke valve 22, an electroinjector, generally indicated by the reference numeral 24, is installed.
  • Each electroinjector 24 is mounted off-centre relatively to the longitudinal axis 17 of the relevant manifold 16, i.e., shifted towards the side of the duct 18.
  • the electroinjector 24 can also be mounted coaxial with the axis 19 of the duct 18.
  • the induction duct 18 with which the injector 24 is associated has a first portion 18' having its axis substantially parallel to the axis of the manifold 16 from which the duct 18 branches off, and a second portion having its axis 19 forming an angle with said axis substantially parallel to the axis of the manifold 16; the axis of the electroinjector 24 and the axis of the first portion 18' of the induction duct 18 are on a same plane, and the electroinjector 24 is located with its axis being skew relatively to the axis of the second portion of the induction duct 18.
  • the induction valves 11 and 12 and the exhaust valves 13 and 14 are operatively connected with respective cam shafts, not shown in the figures, constituting the driving means for these valves.
  • the induction valves 11 are operated by cams having a lift law (a) so computed as to obtain high torques, low consumption rates and reduced emissions of polluting substances under partial-load operating conditions, e.g., such a law as shown in FIG. 3 by the curve 311.
  • induction valves 12 they are operated by means of cams with a lift law (a), so computed as to increase the peak power of the engine, e.g., such as that shown in FIG. 3 by the curve 312.
  • the opening stroke of the valve 11 is narrower than of the valve 12, with the starting of valve 11 opening being delayed relatively to that of the valve 12, relatively to the top dead centre (TDC), and the crossing (i.e., the simultaneous opening astride the TDC) of the induction valves 11 and exhaust valves 13 is minimum, whilst the crossing of the induction valves 12 and exhaust valves 14 is wide.
  • the induction stroke of a cylinder 10 begins with the opening of the relevant valve 12; through it, a stream of air only, or of weakly carburetted air enters, which assumes a whirling movement with a rather high speed, having a lower specific gravity than the airgasoline mixture.
  • valve 11 opens, and through it a stream of strongly carburetted air enters, because all of the fuel delivered by the electroinjector 24 during the injection stroke, or most of it, enters the duct 18.
  • the rich-in-fuel mixture is prevented from passing unburnt to the exhaust port, because the crossing between the induction valves 11 and the exhaust valves 13 is small, whilst the crossing between the induction valve 12, which is concerned by an only air stream, and the exhaust valve 14, is wide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
US07/282,494 1987-12-18 1988-12-12 Induction device for multi-cylinder internal combustion engine Expired - Fee Related US4938191A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23102A/87 1987-12-18
IT23102/87A IT1223543B (it) 1987-12-18 1987-12-18 Dispositivo di aspirazione per un motore a c.i. pluricilindrico

Publications (1)

Publication Number Publication Date
US4938191A true US4938191A (en) 1990-07-03

Family

ID=11203804

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/282,494 Expired - Fee Related US4938191A (en) 1987-12-18 1988-12-12 Induction device for multi-cylinder internal combustion engine

Country Status (5)

Country Link
US (1) US4938191A (it)
EP (1) EP0321033B1 (it)
DE (1) DE3874101T2 (it)
ES (1) ES2034174T3 (it)
IT (1) IT1223543B (it)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050566A (en) * 1989-07-25 1991-09-24 Dr. Ing. H.C.F. Porsche Ag Flow duct for an internal combustion engine
US5069175A (en) * 1990-10-12 1991-12-03 Ford Motor Company Charge intake system for a multi-intake valve per cylinder engine
US5146897A (en) * 1990-09-20 1992-09-15 Mazda Motor Corporation Intake manifold of intake system for multi-cylinder internal combustion engine
US5156124A (en) * 1990-03-15 1992-10-20 Toyota Jidosha Kabushiki Kaisha Fuel injection structure for an internal combustion engine
US5167211A (en) * 1991-12-06 1992-12-01 Toyota Jidosha Kabushiki Kaisha Air intake system for a fuel-injection engine
US5228422A (en) * 1990-12-14 1993-07-20 Lucas Industries Public Limited Company Internal combustion engine and a method of operating same
US5237974A (en) * 1991-10-07 1993-08-24 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Triple-intake-valve internal combustion engine
US5309879A (en) * 1993-03-08 1994-05-10 Chrysler Corporation Double overhead camshaft four valve diesel engine with side prechamber
US5329905A (en) * 1991-10-30 1994-07-19 Honda Giken Kogyo Kabushiki Kaisha Fuel injection type internal combustion engine
US5803045A (en) * 1996-12-13 1998-09-08 Ford Global Technologies, Inc. Air intake slide throttle for an internal combustion engine
US5875745A (en) * 1996-03-21 1999-03-02 Sanshin Kogyo Kabushiki Kaisha Engine throttle control
US20040004329A1 (en) * 2002-07-08 2004-01-08 The Boeing Company Quick change chuck
US20070028894A1 (en) * 2003-09-30 2007-02-08 Puegeot Citroen Automobiles Sa Method for controlling the intake valves of an internal combustion engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402535B (de) * 1990-02-23 1997-06-25 Avl Verbrennungskraft Messtech Brennkraftmaschine mit zumindest zwei einlassventilen je motorzylinder

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1469325A (fr) * 1966-02-05 1967-02-10 Moteur Moderne Le Dispositif spécial concernant l'admission des moteurs alternatifs à combustion interne
FR1511586A (fr) * 1966-12-08 1968-02-02 Citroen Sa Andre Perfectionnement à l'alimentation des moteurs
US4300504A (en) * 1978-08-10 1981-11-17 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine
DE3511382A1 (de) * 1984-03-30 1985-10-10 Nissan Motor Co., Ltd., Yokohama, Kanagawa Ansaugsystem fuer brennkraftmaschinen mit mehreren einlassventilen fuer jede verbrennungskammer
US4625687A (en) * 1983-09-24 1986-12-02 Mazda Motor Corporation Intake arrangement for internal combustion engine
US4660530A (en) * 1985-03-04 1987-04-28 Yamaha Hatsudoki Kabushiki Kaisha Intake system for internal combustion engine
US4669434A (en) * 1985-07-24 1987-06-02 Toyota Jidosha Kabushiki Kaisha Internal combustion engine cylinder head variable swirl siamese type intake port structure, with auxiliary straight passage, pointing at spark plug, leading from mixture intake to downstream end of straight intake port
US4779594A (en) * 1986-04-25 1988-10-25 Mazda Motor Corporation Intake system for an internal combustion engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1469325A (fr) * 1966-02-05 1967-02-10 Moteur Moderne Le Dispositif spécial concernant l'admission des moteurs alternatifs à combustion interne
FR1511586A (fr) * 1966-12-08 1968-02-02 Citroen Sa Andre Perfectionnement à l'alimentation des moteurs
US4300504A (en) * 1978-08-10 1981-11-17 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine
US4625687A (en) * 1983-09-24 1986-12-02 Mazda Motor Corporation Intake arrangement for internal combustion engine
DE3511382A1 (de) * 1984-03-30 1985-10-10 Nissan Motor Co., Ltd., Yokohama, Kanagawa Ansaugsystem fuer brennkraftmaschinen mit mehreren einlassventilen fuer jede verbrennungskammer
US4660530A (en) * 1985-03-04 1987-04-28 Yamaha Hatsudoki Kabushiki Kaisha Intake system for internal combustion engine
US4669434A (en) * 1985-07-24 1987-06-02 Toyota Jidosha Kabushiki Kaisha Internal combustion engine cylinder head variable swirl siamese type intake port structure, with auxiliary straight passage, pointing at spark plug, leading from mixture intake to downstream end of straight intake port
US4779594A (en) * 1986-04-25 1988-10-25 Mazda Motor Corporation Intake system for an internal combustion engine

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050566A (en) * 1989-07-25 1991-09-24 Dr. Ing. H.C.F. Porsche Ag Flow duct for an internal combustion engine
US5156124A (en) * 1990-03-15 1992-10-20 Toyota Jidosha Kabushiki Kaisha Fuel injection structure for an internal combustion engine
US5146897A (en) * 1990-09-20 1992-09-15 Mazda Motor Corporation Intake manifold of intake system for multi-cylinder internal combustion engine
US5069175A (en) * 1990-10-12 1991-12-03 Ford Motor Company Charge intake system for a multi-intake valve per cylinder engine
US5228422A (en) * 1990-12-14 1993-07-20 Lucas Industries Public Limited Company Internal combustion engine and a method of operating same
US5237974A (en) * 1991-10-07 1993-08-24 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Triple-intake-valve internal combustion engine
US5329905A (en) * 1991-10-30 1994-07-19 Honda Giken Kogyo Kabushiki Kaisha Fuel injection type internal combustion engine
US5167211A (en) * 1991-12-06 1992-12-01 Toyota Jidosha Kabushiki Kaisha Air intake system for a fuel-injection engine
US5309879A (en) * 1993-03-08 1994-05-10 Chrysler Corporation Double overhead camshaft four valve diesel engine with side prechamber
US5875745A (en) * 1996-03-21 1999-03-02 Sanshin Kogyo Kabushiki Kaisha Engine throttle control
US5803045A (en) * 1996-12-13 1998-09-08 Ford Global Technologies, Inc. Air intake slide throttle for an internal combustion engine
US20040004329A1 (en) * 2002-07-08 2004-01-08 The Boeing Company Quick change chuck
US6843484B2 (en) * 2002-07-08 2005-01-18 Monte L. Schroeder Quick change chuck
US20070028894A1 (en) * 2003-09-30 2007-02-08 Puegeot Citroen Automobiles Sa Method for controlling the intake valves of an internal combustion engine
US7287513B2 (en) * 2003-09-30 2007-10-30 Peugeot Citroen Automobiles Sa Method for controlling the intake valves of an internal combustion engine

Also Published As

Publication number Publication date
DE3874101D1 (de) 1992-10-01
EP0321033A1 (en) 1989-06-21
ES2034174T3 (es) 1993-04-01
IT1223543B (it) 1990-09-19
DE3874101T2 (de) 1993-01-21
IT8723102A0 (it) 1987-12-18
EP0321033B1 (en) 1992-08-26

Similar Documents

Publication Publication Date Title
US4856473A (en) Internal combustion engine with multiple intake valves and EGR arrangement
US4253432A (en) Intake system of an internal combustion engine of a counter-flow type
US4732117A (en) Two-cycle internal combustion engine
US5305720A (en) Internal combustion engine
US5852994A (en) Induction control system for multi-valve engine
US4523560A (en) Intake device of an internal combustion engine
US4938191A (en) Induction device for multi-cylinder internal combustion engine
US4732118A (en) Two-cycle internal combustion engine
US4732116A (en) Two-cycle internal combustion engine
CN1149904A (zh) 缸内喷油式内燃机
US4438743A (en) Internal combustion engine
US4228772A (en) Low throttled volume engine
EP1179676A1 (en) In-cylinder injection engine
US4867109A (en) Intake passage arrangement for internal combustion engines
EP0249129B1 (en) Two-cycle internal combustion engine
US6131554A (en) Engine having combustion control system
US6223715B1 (en) Combustion chamber for direct injected engine
CN1124408C (zh) 内燃机
US4901680A (en) Intake system for engines
US6155229A (en) Charge motion control valve in upper intake manifold
US4781154A (en) Two-cycle internal combustion engine
US5056474A (en) Internal combustion engine having multiple carburetors and a starting mixture
EP0643206B1 (en) Internal combustion engine
US4449505A (en) Internal combustion engine
JPS59136515A (ja) ３弁式多気筒内燃機関

Legal Events

Date Code Title Description
AS Assignment

Owner name: ALFA LANCIA INDUSTRIALE S.P.A., ARESE (MILAN) ITAL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:OLDANI, EMILIO;ROSA, RICCARDO;TRUZZI, SERGIO;REEL/FRAME:004988/0397

Effective date: 19881129

Owner name: ALFA LANCIA INDUSTRIALE S.P.A., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OLDANI, EMILIO;ROSA, RICCARDO;TRUZZI, SERGIO;REEL/FRAME:004988/0397

Effective date: 19881129

AS Assignment

Owner name: ALFA LANCIA S.P.A., ARESE (MILAN), VIALE ALFA ROME

Free format text: MERGER;ASSIGNOR:ALFA LANCIA INDUSTRIALE S.P.A.;REEL/FRAME:005535/0366

Effective date: 19891031

AS Assignment

Owner name: FIAT AUTO S.P.A., ITALY

Free format text: MERGER;ASSIGNOR:ALFA LANCIA S.P.A. (MERGED INTO);REEL/FRAME:006122/0268

Effective date: 19911120

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19980708

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362